I found a party that does crazy early damage. Believe it or not, it is Warrior with Miserable Mist subskill, with Haohmaru, Metera, and Carmelina of all people. If you throw Rage II and then get all their debuffs to hit, then apply all their damaging skills they do stupid amounts of damage, even more than their usual CA damage. And this is on the first turn.
This is easily one of the most damaging setups I've seen for some reason, and I have the birdman, Sevilbarra and Yuisis. They can do crazy damage too but never on the first turn like that.
I've been farming Amakusa for the event and I can kill the very hard version of him in on the first turn before he even attacks with characters that aren't even uncapped, except Metera who has one star. Any other combo takes several turns. Isn't that weird?